Sieve-operating mechanism



May 20, 1930. J, LOVE, JR 1,759,653

ySIEVE OPERATING MEGHANISI lFiled Jan. 24. 1929 Patented May 2o, 1930.y

UNITED STATES JAMES LOVE, JR., OIFy WILKES-BARRE, PENNSYLVANIVASSIGNOR OF ONE-HALF TO THOMAS POWELL, OF WILKES-BABR-E, PENNSYLVANIA SIEVE-OPERATING MECHANISM z Application filed Januarym, 1929. semina. 334,777. Y Y l This invention relates to yInechanisiii for sifting the sand usedby molders, and kfor other similar purposes; and it consists in the novel construction` and combination of the 5' parts hereinafter fully described and claimed whereby a suitable compoundmotion is im`y struction is provided, and has at one'side a bracket 7 provided with a' vertical bearing 8.y This bearing is provided with a liner or bushing 9, and has a step 10 so vthat the shaft- 12 will rock freely. The rock-shaft 12 is v mounted in the liner 9, and rests upon the step 10. v

A frame 14 is provided for holding a riddle or sieve 15. The riddle or sieve is of thekind suitable for sand, but it may be used for any other material. Y and may be fastened therein by anyapproved means. The sieve frame 14 is supported by arms 16 which project from a hub 17, and the f hub 17 is connected to the shaft 12 by a horizontal pin 18. The rock-shaft preferably has a double-eye 19 at its top, and the hubhas a lug or single-eye 19 whichr is 4pivoted in the double-eye. The hub 17 also has a guard Vplate 2O which is curved downwardly, and

which projects over the pivot oint and bearing, and prevents `sand from entering them by defiecting it laterally'.

The sievefraine 14 has ball'bearing inem- Y bers 21 which project from it radially at diametrically opposite points. yA vdriving shaft 24 is journaled in bearings 25 secured to the top of the supporting frame 6. Cranks 2 6 are secured `to the end portions of the driving shaft, and have crank-pins 27.

' The two cranks 26 are set at an obtuse angle to each other, one crank being preferably 135 degrees in advance of the other. The crankpins are connected to the bearings 21 by conV It is placed in the frame,v

necting-rods 28 4which have balls 29 which engage with the socketsof the ball bearings. Tlieball bearings are fofany-approved construction, and the sockets preferablyhave screwth-readed portions 30 for'engaging with' the balls. 29 and adjusting the freedomf of p connection. Y

The driving shaft` is preferably rotated byan electric motor 32 secured to the supporting v frame, and provided with a pinion 33V which. meshes Tinto a toothed wheel 84 secured on the driving shaft, but any otherapproved means may be used for rotating the driving shaft. The cranks. impart` a compound motion to the sieve frame 14' and they riddle or sieve. The sieve is oscillated horizontally on the aXis'of the rockishaft 12, and is at the same time tilted and oscilla'ted laterally back and yforth on the aXisof the pivot pin 18. Y The lateral tilting and loscillating motion is ef# fected by the action of the two crank-pins 27 which are moved crosswise of the shaft24 from one side'of it, as shown,`to vthe other lside of it, the sievey frameand sieve being" pivoted on'the pin 18 which is arranged ata considerable distance below the sieve. As the' cranks areset at angles to eachother other,`

than degrees, the movements of the con` necting rods are unequal at any stage. This inequality causes one side of the sieve frame vto have a greateror less oscillating movement thanthatof the other which causes the 'frame and its support to tilt to accommodate the inequality of moveinentzof the connecting rods.`

This compondmotionis found very eective: 'in separating t-h'e material placed in the riddle or'sieve, sothatall the finer particles of ity i are discharged, and lumps andaccumulations of sa-nd are broken upf The Vpartsof the machine can be rvariously 9.0i l proportioned, and the sieve can be-niade to;

tilt to a greater or Vless extent in each direc-1" tion, for to an yequal lextentin each direction. Y e5 i The machine will work if the cranksfare set at a right angle Vt-okeach other, buty it willv not work so `well.- `When the'cranks. are set `as shown and described a very satisfactory ratio of `tilting motion to oscillating motion is obtained. Y f v ioni 1 porting frame, a frame for holding a sieve Y Y What Iolainiis:`

'1.111 a sieve operating mechanism, a sup# monted to oscillate horizontally Y 'andV vvtilt laterallyv on the supporting rame,a driving lshaft provided'withcranksset at an obtuseV angle to each other, aridineansfor connect-ing` the cranksV With'fthe sieve rameat' opposite j sidesjoflits vertical axis.

N .2. Av sieve operating" mechanism asrfsetf Vforth inV clalm- 1,-the said cranks being con-V nected with the sieve frame by, feonne'ctingrodshaving ball bearingsat oneend. Y,

' V3. In asieve operating-mechanism, a sup portingrframe provldedwith a vertical bearing at 01179 Sdlya'okfihaft mounted' in the vertical hearing,`

sh'at'by a horizontal'rpivoafa driving shaft providedfvvith cranks' set at an Vobtuse angle Y' 1 to ea'eh other, and means for connecting the eran sfvvith the sieve frame atyopposite sides l ofaieaxis 0f its rock-shaft.

v ffl. A sieve operating mechanism as set forth in' claiin, the Vsaid tilting frame being pro Y Y vided'frwith arms'and a hubhaving a'guard platewhich projeotsjover the top ofthe ver- Vtical `bearing and deflect-s the material out-V f 3 Wardly which falls throligh thesieve' uponA it.

VK"ji sieve "operating meohanisni, comprisinga supporting frame, adrivig shaft joui?V {naled therein5 shaftJ and set aty anobtuse angle toeachother,

` Y a framepfor holding affsieve mounted to os# l yeillate` horizontally and tilt laterally yonthe supportingframefand means Vfor connecting j kthe cranks vvithfthel sieve frameV atio'pposite ,e r ,40 l e v 6. In asieve operating mechanism, as1f1p-,y 5 'port having a vertiealbe'arin', afrook-sha'ft Y mountedin the said bearing, al1r ing a sievepivoted shaft byahorizontal `pivot and sides of itsfverticalaxis.

raniefor holdtooneend of thel roeka tilting iframe for vholding n asieve conneetedtothe upper end of the rock-f free to tiltV Y a motor secured Lto the frame,`

- Y driving Wheels feonnecting the motor with the"V Y 3 drivingwshaft, cr nks'seoured to the driving' Y and oscillate' crosswi'se of thervrook-shaft, and

Vgfrfe'es;andginefansfor Vcon'nectir1-1gifthe,VV saidl l Yoranlzfs'. with sieve traine upon-oppqte." Y'

#In testimony avhereofll,aveiaihxed "signatnreV 11 "f 

